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net: Basic netns dump/restore skeleton

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Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov
2012-08-02 08:06:29 +04:00
parent 2d56d1b056
commit 0a827aa96c
6 changed files with 46 additions and 0 deletions
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15
namespaces.c
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@@ -8,6 +8,7 @@
#include "ipc_ns.h"
#include "mount.h"
#include "namespaces.h"
#include "net.h"
int switch_ns(int pid, int type, char *ns, int *rst)
{
@@ -87,6 +88,12 @@ static int do_dump_namespaces(struct pid *ns_pid, unsigned int ns_flags)
if (ret < 0)
goto err;
}
if (ns_flags & CLONE_NEWNET) {
pr_info("Dump NET namespace info\n");
ret = dump_net_ns(ns_pid->real, fdset);
if (ret < 0)
goto err;
}
err:
close_cr_fdset(&fdset);
return ret;
@@ -149,6 +156,14 @@ int prepare_namespace(int pid, unsigned long clone_flags)
pr_info("Restoring namespaces %d flags 0x%lx\n",
pid, clone_flags);
/*
* On netns restore we launch an IP tool, thus we
* have to restore it _before_ altering the mount
* tree (i.e. -- mnt_ns restoring)
*/
if (clone_flags & CLONE_NEWNET)
ret = prepare_net_ns(pid);
if (clone_flags & CLONE_NEWUTS)
ret = prepare_utsns(pid);
if (clone_flags & CLONE_NEWIPC)